<!--
 * @Author: your name
 * @Date: 2021-10-18 15:01:46
 * @LastEditTime: 2021-10-20 00:26:46
 * @LastEditors: Please set LastEditors
 * @Description: In User Settings Edit
 * @FilePath: \vue_test3\src\components\goods\Params.vue
-->
<template>
  <div>
       <!-- 面包屑导航 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>参数列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图区域 -->
    <el-card>
        <!-- 头部警告区域 -->
        <el-alert
            title="注意:只允许为第三级分类设置相关参数"
            type="warning" :closable="false" show-icon>
        </el-alert>

        <!-- 选择商品分类区域 -->
        <el-row class="cat_opt" >
            <el-col :span="1.5">
                <span>选择商品分类:</span>
                <!-- 选择商品分类的级联选择框 -->
                <el-cascader
                v-model="selectCateKeys"
                :options="catelist"
                :props="{ value: 'cat_id',
                    label: 'cat_name',
                    children:'children',
                    expandTrigger: 'hover',
                    }"
                ref="elcascader"
                @change="parentCateChange"></el-cascader>


            </el-col>
        </el-row>

        <!-- tab页面区域 -->
        <el-tabs v-model="activeName" @tab-click="handleTabClick" >
            <!-- 添加动态参数的面板 -->
            <el-tab-pane label="动态参数" name="many" >
                <el-button type="primary" size="mini" :disabled="isBtnDisabled" @click="paramsDialogVisible=true">添加参数</el-button>
                <!-- 动态参数表格 -->
                <el-table :data="manyTabeData" border stripe>
                    <!-- 展开行 -->
                    <el-table-column type="expand">
                        <template slot-scope="scope">
                            <!-- 循环渲染Tag标签 -->
                            <el-tag v-for="(item,i) in scope.row.attr_vals" :key="i" closable @close="handleClose(i,scope.row)">{{item}}</el-tag>
                            <!-- 输入文本框 -->
                            <el-input
                            class="input-new-tag"
                            v-if="scope.row.inputVisible"
                            v-model="scope.row.inputValue"
                            ref="saveTagInput"
                            size="small"
                            @keyup.enter.native="handleInputConfirm(scope.row)"
                            @blur="handleInputConfirm(scope.row)"
                            >
                            </el-input>
                            <!-- 输入按钮 -->
                            <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>
                        </template>
                    </el-table-column>
                    <!-- 索引列 -->
                    <el-table-column type="index"></el-table-column>
                    <el-table-column label="参数名称" prop="attr_name"></el-table-column>
                    <el-table-column label="操作">
                    <template slot-scope="scope">
                        <el-button size="mini" type="primary" icon="el-icon-edit" @click="showEditDialog(scope.row.attr_id)">编辑</el-button>
                        <el-button size="mini" type="danger" icon="el-icon-delete" @click="removeParams(scope.row.attr_id)">删除</el-button>
                    </template>
                    </el-table-column>
                </el-table>
            </el-tab-pane>
            <!-- 添加动态属性的面板 -->
            <el-tab-pane label="静态属性" name="only" >
                <el-button type="primary" size="mini" :disabled="isBtnDisabled" @click="paramsDialogVisible=true"> 添加属性</el-button>
                <!-- 静态参数表格 -->
                <el-table :data="onlyTabeData" border stripe >
                    <!-- 展开行 -->
                    <el-table-column type="expand">
                        <template slot-scope="scope">
                            <!-- 循环渲染Tag标签 -->
                            <el-tag v-for="(item,i) in scope.row.attr_vals" :key="i" closable @close="handleClose(i,scope.row)">{{item}}</el-tag>
                            <!-- 输入文本框 -->
                            <el-input
                            class="input-new-tag"
                            v-if="scope.row.inputVisible"
                            v-model="scope.row.inputValue"
                            ref="saveTagInput"
                            size="small"
                            @keyup.enter.native="handleInputConfirm(scope.row)"
                            @blur="handleInputConfirm(scope.row)"
                            >
                            </el-input>
                            <!-- 输入按钮 -->
                            <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>
                        </template>
                    </el-table-column>
                    <!-- 索引列 -->
                    <el-table-column type="index"></el-table-column>
                    <el-table-column label="属性名称" prop="attr_name"></el-table-column>
                    <el-table-column label="操作">
                    <template slot-scope="scope">
                        <el-button size="mini" type="primary" icon="el-icon-edit" @click="showEditDialog(scope.row.attr_id)">编辑</el-button>
                        <el-button size="mini" type="danger" icon="el-icon-delete" @click="removeParams(scope.row.attr_id)">删除</el-button>
                    </template>
                    </el-table-column>
                </el-table>
            </el-tab-pane>
            
        </el-tabs>


    </el-card>

    <!-- 添加参数的对话框 -->
    <el-dialog
        :title="'添加'+titleText"
        :visible.sync="paramsDialogVisible"
        width="50%"
        @close="addDialog"
        >
        <el-form :model="paramsRuleForm" :rules="paramsRules" ref="paramsRuleForm" label-width="100px">
            <el-form-item :label="titleText" prop="attr_name">
                <el-input v-model="paramsRuleForm.attr_name" :span="3"></el-input>
            </el-form-item>
        </el-form>
        <span slot="footer" class="dialog-footer">
            <el-button @click="paramsDialogVisible = false">取 消</el-button>
            <el-button type="primary" @click="addParams">确 定</el-button>
        </span>
    </el-dialog>

    <!-- 修改参数对话框 -->
    <el-dialog
        :title="'修改'+titleText"
        :visible.sync="editDialogVisible"
        width="50%"
        @close="editDialog"
        >
        <el-form :model="editRuleForm" :rules="editRules" ref="editRuleFormRef" label-width="100px">
            <el-form-item :label="titleText" prop="attr_name">
                <el-input v-model="editRuleForm.attr_name" :span="3"></el-input>
            </el-form-item>
        </el-form>
        <span slot="footer" class="dialog-footer">
            <el-button @click="editDialogVisible = false">取 消</el-button>
            <el-button type="primary" @click="editParams">确 定</el-button>
        </span>
    </el-dialog>

  </div>
</template>

<script>
export default {
    data() {
        return {
          catelist:[],
        //   级联选择框双向绑定到的数组
          selectCateKeys:[],
        
        // 默认tab选中的标签
        activeName:"many",

        //动态分类中保存的数据
        manyTabeData:[],

        //静态分类中保存的数据
        onlyTabeData:[],

        // 参数对话框的展示和隐藏
        paramsDialogVisible:false,

        //修改参数的对话框的展示和隐藏
        editDialogVisible:false,

        //参数对话框的数据绑定
        paramsRuleForm:{
            attr_name:''
        },

        // 修改参数对话框的数据绑定
        editRuleForm:{
            attr_name:''
        },

        //参数对话框的验证规则
        paramsRules:{
            attr_name:[
                    { required: true, message: '请输入参数名称', trigger: 'blur' },
                ],
        },

        // 修改参数对话框的验证规则
        editRules:{
             attr_name:[
                    { required: true, message: '请输入参数名称', trigger: 'blur' },
                ],
        },

        //e-tag的input的显示和隐藏
        // inputVisible:false,

        // inputValue:'',

        }
    },
    created(){
        this.getCateList()
    },
    methods:{
        async getCateList(){
           const {data:res}  =  await this.$http.get('categories')
            if (res.meta.status !==200) {
                return this.$message.error('获取分类列表错误')
            }
            // console.log(res.data)
            this.catelist = res.data
            // console.log(this.catelist)
        },
        //级联选择框选中时触发的函数
        parentCateChange(){
           this.getParamsList()
        },

        // tab标签点击事件
        handleTabClick(){
            this.getParamsList()
        },

        //获取分类属性和参数
        async getParamsList(){
             // 根据所选分类的ID,和当前所处的面板,获取对应的参数
             const {data:res} =  await this.$http.get(`categories/${this.cateId}/attributes`,{params:{sel:this.activeName}})
            if (res.meta.status !==200) {
                return this.$message.error('获取参数列表失败')
            }
            
            //将attr_vals字符串循环成数组
            res.data.forEach(item => {
                //判断下数组中是否以,分割,空就返回空的数组,并赋值到attr_vals
                item.attr_vals = item.attr_vals  ? item.attr_vals.split(',') : []
                item.inputVisible = false,
                item.inputValue=''
            });
            // console.log(res.data)
            if (this.activeName === 'many') {
                this.manyTabeData = res.data
            } else {
                this.onlyTabeData = res.data
            }    

            
        },

        // 关闭添加分类对话框清除输入的值
        addDialog(){
            this.$refs.paramsRuleForm.resetFields()
        },

        //关闭修改参数对话框清除输入的值
        editDialog(){
            this.$refs.editRuleFormRef.resetFields()
        },

        //添加参数/属性
        addParams(){
            this.$refs.paramsRuleForm.validate(async valid=>{
                if (!valid) {return}
                    
           const {data:res} =    await this.$http.post(`categories/${this.cateId}/attributes`,{
                    attr_name: this.paramsRuleForm.attr_name,   
                    attr_sel:this.activeName
                })
                if (res.meta.status !== 201) {
                return this.$message.error('添加参数失败！')
                }
                // console.log(res.data)
                this.$message.success('添加参数成功！')
                this.paramsDialogVisible = false
                this.getParamsList()
            })
        },

        //点击按钮,展示修改对话框
        async showEditDialog(attr_id){
            // this.editDialogVisible = true
            const {data:res} = await this.$http.get(`categories/${this.cateId}/attributes/${attr_id}`,{params:{attr_sel:this.activeName}})
             if (res.meta.status !==200) {
                return this.$message.error('获取参数列表失败')
            }
            this.editRuleForm = res.data
            this.editDialogVisible = true
            
        },

        //点击按钮确定修改对话框
        editParams(){
            this.$refs.editRuleFormRef.validate(async valid=>{
                if (!valid) return
                    
                
                const {data:res} =  await this.$http.put(`categories/${this.cateId}/attributes/${this.editRuleForm.attr_id}`,{attr_name:this.editRuleForm.attr_name,attr_sel:this.activeName})
                //  console.log(res.data)
                 if (res.meta.status !==200) {
                return this.$message.error('修改参数列表失败')
                }
                this.$message.success('修改参数列表成功')
                this.editDialogVisible = false
                this.getParamsList()
            })
        },

        // 根据ID删除对应项
        async removeParams(attr_id){
                    const confirmResult = await this.$confirm(
                '此操作将永久删除该用户, 是否继续?',
                '提示',
                {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
                }
            ).catch(err => err)

            // 如果用户确认删除，则返回值为字符串 confirm
            // 如果用户取消了删除，则返回值为字符串 cancel
            // console.log(confirmResult)
            if (confirmResult !== 'confirm') {
                return this.$message.info('已取消删除')
            }

            const { data: res } = await this.$http.delete(`categories/${this.cateId}/attributes/${attr_id}`)

            if (res.meta.status !== 200) {
                return this.$message.error('删除参数失败！')
            }

            this.$message.success('删除参数成功！')
            //重新刷新数据
                this.getParamsList()
        }, 
        
        //输入文本框的动作
        async handleInputConfirm(row){
            // 判断是否输入空格的文本框
            if (row.inputValue.trim().length === 0) {
                row.inputValue='',
                row.inputVisible = false;
                return
            }
            // 没有return证明没有输入空的内容,需要进一步处理
            // 将输入的值保存到attr_vals,数组中
            row.attr_vals.push (row.inputValue.trim()),
            row.inputValue='',
            row.inputVisible = false;
            // 需要发起请求保存输入的内容
            this.saveAttrVals(row)

        },

        async saveAttrVals(row){
            const {data:res} =  await this.$http.put(`categories/${this.cateId}/attributes/${row.attr_id}`,{
                attr_name:row.attr_name,
                attr_sel:this.activeName,
                attr_vals:row.attr_vals.join(',')
            })
             if (res.meta.status !== 200) {
                return this.$message.error('修改参数失败！')
            }

            this.$message.success('修改参数成功！')
        },

        //input的点击动作方法
        showInput(row){
            row.inputVisible = true;    
            //当页面重新渲染之后,nextTick才会被调用
             this.$nextTick(_ => {
                this.$refs.saveTagInput.$refs.input.focus();
                });
        },

        // 参数标签内的删除
        handleClose(i,row){
            row.attr_vals.splice(i,1)
            this.saveAttrVals(row)

        }


    },

    //计算属性
    computed:{
        isBtnDisabled(){
            if (this.selectCateKeys.length !==3) {
                return true
            }
            return false
        },
        //当前分类选择了三级分类ID
        cateId(){
            if (this.selectCateKeys.length ===3) {
                return this.selectCateKeys[2]
            }
            return null
        },

        //计算动态属性标题
        titleText(){
            if (this.activeName === "many") {
                return '动态参数'
            }
            return '静态属性'
        }

        
    
    }
}
</script>

<style rel="stylesheet/less" scoped>
.cat_opt{
    margin: 15px 0;
}

.el-tag{
    margin:10px;
}

.input-new-tag{
    width: 120px;
}
</style>
